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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-02-14 15:20:11 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-02-14 15:20:11 -0800 |
| commit | 694ce18ec3485f5b0a4f3820073f5e2b0b4e0870 (patch) | |
| tree | e979926df34b41e17024107ee4731739608d8b51 /arch | |
| parent | 13d261932bbfff7f45f288c5c8cce43177cccd3b (diff) | |
| parent | a43a5ccdfa5bd5b2f00aa9b2321df268c2e5d6e2 (diff) | |
| download | linux-0-day-694ce18ec3485f5b0a4f3820073f5e2b0b4e0870.tar.gz linux-0-day-694ce18ec3485f5b0a4f3820073f5e2b0b4e0870.tar.xz | |
Merge tag 'stable/for-linus-fixes-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Two fixes for VCPU offlining; One to fix the string format exposed
by the xen-pci[front|back] to conform to the one used in majority of
PCI drivers; Two fixes to make the code more resilient to invalid
configurations.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* tag 'stable/for-linus-fixes-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xenbus_dev: add missing error check to watch handling
xen/pci[front|back]: Use %d instead of %1x for displaying PCI devfn.
xen pvhvm: do not remap pirqs onto evtchns if !xen_have_vector_callback
xen/smp: Fix CPU online/offline bug triggering a BUG: scheduling while atomic.
xen/bootup: During bootup suppress XENBUS: Unable to read cpu state
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/pci/xen.c | 2 | ||||
| -rw-r--r-- | arch/x86/xen/smp.c | 7 |
2 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 492ade8c978e3..d99346ea8fdb4 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -374,7 +374,7 @@ int __init pci_xen_init(void) int __init pci_xen_hvm_init(void) { - if (!xen_feature(XENFEAT_hvm_pirqs)) + if (!xen_have_vector_callback || !xen_feature(XENFEAT_hvm_pirqs)) return 0; #ifdef CONFIG_ACPI diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 041d4fe9dfe4b..501d4e0244ba2 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -409,6 +409,13 @@ static void __cpuinit xen_play_dead(void) /* used only with HOTPLUG_CPU */ play_dead_common(); HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL); cpu_bringup(); + /* + * Balance out the preempt calls - as we are running in cpu_idle + * loop which has been called at bootup from cpu_bringup_and_idle. + * The cpucpu_bringup_and_idle called cpu_bringup which made a + * preempt_disable() So this preempt_enable will balance it out. + */ + preempt_enable(); } #else /* !CONFIG_HOTPLUG_CPU */ |